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2. A.C. Paul, Lawrence Berkeley Lab., LBL-13241,1982 (unpublished)
3. D.L. Vogel, Lawrence Berkeley Lab., LBL-18871, 1985 (unpublished)
4. J.E. Boers, Sandia National Labs, SAND 79-1027, 1980 (unpublished)
5. The Design of Gridded Pierce Guns for Accelerators